Incandescent-lamp burner.



" Patented July 10.1900.

2 Sheets-Sheet u. Lia-mum.r INCANDESE-NT LAMP BURNER.

(Application Bled Nov. 15, 1899.)

(No Model.)

l. @Mommy Tn: mams Prsas co, nwo-umu., WASHINGTON, D. c.

No. 653,254. Patented luly l0, 1900;

o. LEHMAN. INCANDESGENT `LAMP BURNER.

(Application filed :NonlbE 1899.) (No Model.) 2 Sheets-Sheet 2.

umuuulm nlmlinrlrunf4 iHH-Il IIIIIIH rrnn STATES OTTO LEHMAN, OF NEWYORK, N. Y.,

i, PATENT Prien,

ASSIGNOR, BY MESNE ASSIGNMENTS,

MAINE.

INCANDESCENT-LAM P BURNER.

SPECIFICATION forming part of Letters Patent No. 653,254, dated July 10,-1 900.. Application lcdNovember 15,1899.'4 Serial No. 737,079. (Nomodel.)

To @ZZ whom t may concern.- Be it known that I, Grro LEHMAN, a citizenof the United States, residing at New York, in the county of New Yorkand State of New York, have invented certain new and useful Improvementsin Incandescent-Lamp Burners, of which the following is a specification,reference being had therein to the accompanying drawings.

My invention relates to that class of burners adapted to produce from aliquid hydrocarbon a flame suitable for heating to'incandesccnce aiilamentary or gauze mantle for incandescent illumination; and theinvention has for its object to produce a burner of this kind adapted tobe applied to well-known forms of kerosene or other `liquid-hydrocarbonlamps, the improved burner being of such a character that there will beno offensive odor or smell resulting from imperfect combustion when thelamp is first lighted, when it is burning, or after it has beenextinguished. Means are also provided in the improved burner foravoiding smoking of the filamentary mantle, such means serving to keepthe burning end of the Wick smooth and even, so that there will be noprojectingiilaments which will result in an uneven iiame. i Y

In the accompanying drawings, Figures l and `2 are central verticalsections at right angles to each other of the improved burner. Fig. 3 isa side view of the same; Eig. 4, a cross-section on line a; a, of Fig.3. Fig. 5 is a detail view of a verticallyadj ustable wickcontrollingsleeve. Fig. 6 is a detail view of the mantle-support.

The base a of the burner is preferably provided with a screw-threadedportion b for attachment to the threaded collar of a lamp. The said baseo, is also preferably provided with a screw-threaded portion c toreceive a threaded portion d of a foramino us or open? work casing c,within the upper part of which is loosely tted a skeleton or open-worksleeve f, which is attached to the chimney-gallery g,

and which chimney gallery supports the cone h.

The base a is preferably hollow, as shown, to form an ainheatin gchamber t', which communicates at one side of the burner by thepassage-Way j with the interior of the drafttube 7s, which is rigidlyattached to the burner base. The outer wallof the said chamber i isperforated for the free admission of air to said chamber, and as theburner-base is in conductive connection with the top of the burner wherethe flame will be through the draft-tube 7c and Wick-controlling tube nthe said burner-base will become somewhat heated, so that the airentering the chamber will be heated on its way to the flame. Thisheating of the inflowing air contributes to more perfect combustion thanwould otherwise occur and makes a stronger blue flame than would beproduced by using cold air, while theinflowingouter cool air to theburner-base serves to prevent the said base from becoming too muchheated. i

Surrounding the draft-tube 7o is a sliding wick-raiserl, having atitsupper endjsuitable sharp-pointed projections to engage the wick m, whichis wrapped around it and which is held against the points or projectionsof the wick-raiser by the wick-controlling tube n, having at its upperend an inturned lip o, which projects above the outer portion of theupper end of the wick to about the middle of the thickness of thelatter. The lip o may be integral with the tube n or formed on a ringl2,Xed to the top of said tube. The lower enlarged part p of the said tuben embraces with a close sliding fit an annular flange q, projectingupward from the burnerbase, the said part p of the said tube n beingprovided with bayonet-slots r, adapted to embrace pins or studs s on thesaid iangc q. This construction permits the tube u to be removed whendesired and also permits, ow-

ing to the heights of the inner parts of the bayonet-joint slots, alimited upward and downward movement of the Said tube relative to theburner-base. l j A Movable in a suitable guideway formedin" the presentinstance by a small tubet within the draft-tube 7c is a rack u, attachedAat its lower end to the wick-raiser, and which rack meshes with apinion o, fixed to the wick-raising shaft w, provided with a suitablefingerwheel o: for raising and lowering the wick.

Supported in the upper part of the draft- IOO tube lc, as by a smallspider y, is a cap z, attached to the upper end of a stem 2, the saidcap having a diameter somewhat less than the diameter in the opening atthe upper end of the cone h, and the said cap beingpreferably soarranged that it is slightly above the top of the said cone. Thisarrangement of the said cap relative tosaid cone affords the bestpossible results in heating the incandescing filamentary mantle.

The sleeve f, depending from the chimneygallery g, is provided withspiral slots 3, ha-ving short, straight, or horizontal portions i` attheir lower ends, the said slots being engaged by pins 5, attached tothe outer openwork casin g c. This construction permits thechimney-gallery to be raised by an upward and slight turning movementwhen the Wick is tolbe lighted through lighting-openings 6 in theopen-work sleeve f, while the straight portions 4 at the lower ends ofthe spiral slots 3 permit the sleeve f, which supports thechimney-gallery, to be held in a raised position without danger ofdisplacement when the said sleeve and chimney-gallery have been liftedto light the wick. The spiral slots 3 prevent a too-sudden descent ofthe chimneygallery when the latter is to be lowered, and thereby avoiddanger of injury to the fragile filamentary mantle, supported by andvertically movable with the chimney-gallery, by sudden jars which mightotherwise occur when the chimney-gallery is lowered after the lamp hasbeen lighted.

The incandescing filamentary mantle 7 is supported by a rod 8,preferably fixed to an open-work sleeve 9, iitting somewhat closelyaround lthe base of the cone h, but loosely encircling the top of saidcone, so that the skirt of the mantle may fall down between the saidconeand the said sleeve, the mantle being thus steadied and heldsecurely in place. The openings in the sleeve 9 permit of an inflow ofair 'at the base of the mantle. The sleeve 9 rests on the base of thecone h, and the latter serves as a stop when the mantleholder is set inplace to insure the proper adjustment of the mantle relative to theburner, so that no skill or attention on the part of the user isrequired to secure this very important adjustment, the parts beingsuitably y.proportioned in their manufacture.

When the lamp is in operation afterhaving been lighted, air iiowsfreelyffrom the chamber 1l in the base of the burner through thedraft-tube 7c to the top of the interior portion of lthe wick m and atwhich top interior portion the combustion mostly occurs. Air will alsoflow freely through the open-work casing e and open-Work sleeve f to theinterior of the chimney-gallery, where is formed at the upper end of thesleeve f a somewhat abrupt concave shoulder Il, which tends to compressthe upwardly-owing air inwardly, and thus by contracting the volume ofair serves to in crease the upward draft within the cone h.

In adjusting the wick to burning position .the latter is lifted by thewick-raiser until it comes in contact with the inwardly-turned lip orflange 0 at the upper end of the wickcontrolling tube n, when a furtherupward movement of the wick will raise the said tube until its upwardmovement is arrested by the kcontact of the lower `walls of the innerportions of the bayonet-j oint slots r with the pins or studs s on theflange q of the burner-base. The contact of the upper end of the wickwith the said inwardly-turned lip of the wickcontrolling tube evens theupper end of the wick, and if there are any projecting filaments whichmight cause an uneven flame such projecting filaments are smoothed downby contact of the wick with the said lip. When the wick in the positionreferred to is lighted, the proper adjustment of the wick to burningposition is effected by loweringthe wick, and with it thewick-controlling tube n, (between which latter and the wick there issufficient frictional hold to effect this result,) until the upper wallsof the inner portionsof the bayonet-joint slots r come in contact withthe studs s, andthereby arrest the further downward movement of` thewick-controlling tube. A very slight further downward movement of thewick, so that its upper end is just below the inturned lip or flange oof the vvick-cont1olling tube, brings the said wick into what willordinarily be proper burning position. Thus the wick is cont-rolled andadjusted in a reliable manner, and, owing to the proper adjustment ofthewicl; and the peculiar construction of the cooperating parts of theburner, it results that a blue flame suitable for heating thefilamentary mantle to incandescence is produced and a beautiful Whiteincandescence of the mantle is secured without danger of smoking themantle, and the combustion is so complete that there is no offensivesmell or odor when the lamp is first lighted, when it is burning, orafter it has been extinguished, the gasifying of the liquid hydrocarbonbeing produced ator so close to the point of combustion that-there is nounconsumed gas which in escaping might produce an unpleasant odor whenthe' Ylamp has been extinguished.

Having thus described my invention, I claim and desire to secure byLetters Patent-S 1. In a burner, the combination withthe base thereof,provided with an air-l1eating chamber, of a draft-tube with whichsaidchamber communicates, a vertically-movable wick-tube outside of saiddraft-tube and between which latter and said draft-tube the wick isreceived, and which tightly encirclcs said wick, a wick-adjusting devicealso -between said draft-tube and vWick-tube, a ver ticallymovablechimneygallery support, a cone sustained by said support, and `means forholding an incandescin g mantle above-the said cone.

2. In a burner, the combination with the base thereof, provided with anairheating chamber, of a draft-tube with which said IOO IIO

chamber communicates, a vertically-movable wick-tube outside of saiddraft-tube and between which latter and said draft-tube the wick isreceived, and which tightly encircles said wick, said wick-tube havingan inturned lip at its upper end, a wick-adjusting device also betweensaid draft-tube and wick-tube, a vertically-movable chimneygallerysupport, a cone sustained by said support, and means for holding anincandescing mantle above the said cone.

8. In a burner, the combination with the base thereof, a casing attachedto said base, a vertically-movable chimney-gallery mounted on saidcasing, a cone supported by said chimney-gallery, draft and wick tubeswith means for holding a wick between them, and a mantle-holderconsisting of a sleeve provided with a mantle-supportin g rod, saidsleeve loosely surrounding the top of said cone with a space betweenthese parts to receive the skirt of the mantle, the base of said coneserving as a stop for insuring the proper vertical adjustment of saidsleeve.

4. In a burner, the combination with the base thereof, a casingattachedto said base, a vertically-movable chimney-gallery mounted on saidcasing, a cone supported by said chimney-gallery, draft and wick tubeswith means for holding a wick between them, and a mantle-holderconsisting of an open-work sleeve provided with a mantle-supporting rod,said sleeve loosely surrounding the top of said cone with a spacebetween these parts to receive the skirt of the mantle, the base of saidcone serving as a stop for insuring the proper vertical adjustment ofsaid sleeve.

5. In a burner, the combination with the base thereof, of adraft-tubexed to said base, a wick-controlling tube loosely surroundingsaid draft-tube with space between said tubes for the reception of awick, said wick-controlling tube tightly encircling said Wick so as tobe moved up and down thereby and being vertically movable relative tosaid base and being provided atits upper end with an inturned lip, acasing attached to said base, a chimneygallery supported by said casingand provided with a cone, and a cap supported by the said draft-tube andarranged centrally in the opening of said cone and slightly above thetop of the latter.

6. In a burner, the combination with the base thereof, of a draft-tubefixed to said base, a vertically-movable wick-controlling tube looselysurrounding said draft tube with space between said tubes for thereception of a wick, said wick-controlling tube tightly encircling saidVwick so as to be moved vertically therewith and having at its upper endan inturned lip and being provided at its lower portion withbayonet-joint slots, and the said burner base being provided with anupwardly-projecting iiange having pins engaging said slots, a casingattached to said base, a chimney-gallery supported by saidl casing andprovided with a cone, and a mantle-holder supported by saidchimney-gallery.

7. In a burner, the combination with the base thereof, of a draft-tubefixed to said base, a wick-controlling tube loosely surrounding saiddraft-tube with space between said tubes for the reception of a wickwhich said wicktube tightly encircles so as to be moved verticallytherewith, an outer casing attached to saidbase, a vertically-movablechimney-gallery providedv with a depending sleeve inclosed by said outercasing, said depending sleeve having at its interior upper portion anabrupt shoulder forming a contracted opening at the top of said sleeve,a cone supported by said chimney-gallery and the central opening ofwhich communicates with the said contracted opening of said dependingsleeve, and a iilamentary mantle surmounting said cone.

In testimony whereof I affix my signature in the presence of twowitnesses.

OTTO LEHMAN.

Witnesses:

M. A. SIGLER, G. CLARENCE PHILLIPS.

